Window screen



F. S. ZAISSER WINDOW SCREEN Aug. 6, 1929.

Filed May 14, 1926 INVENTOR.

/ A TTORNEY.

Patented Aug. 6, 1929.

UNITED STATES FRITZ S. ZAISSEIR, OF NEVI YORK, N. Y.

WINDOW? SCH Application filed May 14,

This invention relates to window screens or ventilators of the type which are inserted in the window when the sash is open and l as for an object to provide an il'nproved closure between the sash and the screen and to prevent rattling of the screen. Other objects of the invention will appear from the following specification and the accompanying drawings in which, Fig. 1, is a plan view of a .rcreen embodying my invention, Fig. 2 is an elevation, partly in section, showing screen with my invention in place, Fig. 3 is an elevation, partly in section, showing an alternative form of my invention,Fig. 4 shows a method of slidably connecting the members of the screen, Fig. 5 is a modification and Figs. 6 and 7 show a detachable cleat for the purpose of preventing lost motion in screens.

This invention is applied to screens or ventilators of the type which are constructed of a pair of sliding f'ames arranged to fit into the window frame when the sash is opened and upon which the sash rests. In practice the window sash does not close tightly on the screen, it either rests on the screen on the skew or the screen itself is not horizontal with the result that the sash engages the screen only in one or two spots usually at one end with the result that the other end. is free and vibrates under a draft between the window slats maliing a noise, and at the same time an imperfect closure exists between the sash and the screen.

In the present invention one of the horizontal members of the screen frame is pro vided with a vertical projection which aligns with the front of the sash and forms a rabbeted connection with the sash throughout its length. This forms a complete closure between the sash and the screen and binds the screen against the window slats so that it is not free to vibrate and rattle. This arrangement is formed integral with the frame mem bers of the screen and can be embodied in the popular type of screen at a mere nominal expense.

Referring to the drawings, 11 is the window sash, 12 and 13 are the window slats between which the sash slides and 14 is the groove in the window frame formed by the slats. This groove terminates in the sill. at 15 which usually slopes outwards.

The screen comprises the end posts 21 and 22 which support the horizontal members. The frame is constructed in two independent parts, one comprising the end post 21, the

1926. Serial 'No. 109,154.

top rail 23 and the bottom rail 30, Fig. 2.

The other ends of the top and bottom rails are held together by a bar which is not shown. The other part of the frame associated with the end post 22 corresponds to that just described.

A screen material of wire, cloth, or other material is secured to each frame. This is indicated by 27 which is secured to the top rail 23 by the cleat 28 and to the bottom rail 30 by the clcat 29. The two parts of the frame are constructed to. slide upon each other so that the screen is adjustable for various sizes of windows. A common form of sliding connection is the rabbcted grove 31 in each of the lmrizontal. rails and 24, Fig. 4., the stud 33 is secured in one of these grooves having the head 32 which engages the complimentary groove, thereby providing an expanding frame.

The upstanding ledge 26 is provided in the top rail 23 and with the horizontal portion 25 forms a right angle corner which is engaged by the window ..lSl1 as indicated in Fig. 2. This closes any irregularities in the seam between the sash and the screen and prevents the transverse movement of the screen relative to the sash. The bottom of the screen is held by friction against the sill 15 and against the slat l2 and with the ledge 26 engaging the sash throu ihout its length lost motion and noise is prevented. The top of the ledge 26 is rounded and may be formed on a slight incline where it engages the front of the sash to insure proper engagement. The end posts are somewhat staggered in relation as shown in. Fi 1 and in this position the post 22 may cnpja e the slat 13 while the post 2i may engra e the slat 12. here desired, a spacer 35 may be used to force the end posts against the slot 12 as indicated in Fig. 2.

here the sliding members of the frame are made from sheet metal the construction in 3 may be used. The top rail 43 Sup ports the screen 46 and is slidablv connected with the rail. 42 by the stud 44. The rail 43 is made of sheet metal with. the upper edge can-led at 4:7 to give rigidity to the construction and the lower edge turned over at 48 to engage the edge of 4:2. The rail 42 is of sheet metal and supports the screen 45. This rail is bent at 4-9 over the top of the end post 41 and projects parallel with the window sash with the upper edge turned into an. eye at 51. Au incline is formed at 50 between this projection and the window sash. This rail is secured to the end post by wood screws as indicated in dotted outline. The projection with the rounded edge 51 extends parallel with the sash and prevents lost motion in the window frame of the screen when in lace. The sheet metal of this rail readily con orms to the contour of the window sash forming a close engagement with the sash at 49.

This screen has been describe-d and shown adapted for use with the lower sash of a window, but it will be apparent that it is also adaptable for use with the upper sash,

merely by turning it upside down.

7 In the screen as shown in Fig. 1, the projection 26 is provided in one half of the screen only. Where it is desired to provide this projection on both halves of the screen the construction in Fig. 5 may be used. In this case the top bar 43 is bent over at 49" to the form of bar 42 and these bent parts slide upon each other against the window sash, thus formin a closure all the way between the screen an the sash.

This invention may be applied to screens of the ordinary type by using the detachable cleats shown in Figs. 6 and 7. A piece of fiat steel stock 61 is bent to form sides 62 and 63 as shown and has punched therefrom the fingers 64 which oppose the side 63 and therewith grips the top rail 23 of the window sash. The rojecting sides 61 and 62 engage the sash 1n two planes at right angles to each other and thereby restrict the movement of the screen under the sash.

Having thus described my invention, I claim:

A removable window screen as described comprising a pair of sheet metal frames supporting the screen wire and slidably connected one to the other, the to rail of one of said frames being bent inwar y and upwardly in a right angle to engage the window sash and a vertical end post fitting below said inwardly bent portion and secured to said top rail.

In testimony whereof I alfix my signature.

FRITZ S. ZAISSER. 

